Scheduling and bandwidth part adaptation techniques for extended reality

ABSTRACT

Certain aspects of the present disclosure provide techniques for scheduling and bandwidth part (BWP) adaptation for extended reality (XR). A method that may be performed by a user equipment (UE) includes obtaining an indication to change at least one of a minimum control-channel-to-data-channel delay or a bandwidth for receiving a first transmission on a BWP; changing the at least one of the minimum control-channel-to-data-channel delay to a new minimum control-channel-to-data-channel delay or the bandwidth on the BWP to a new bandwidth; and receiving the first transmission on the BWP using the at least one of the new minimum control-channel-to-data-channel delay or the new bandwidth of the BWP.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims benefit of and priority to U.S. ProvisionalPatent Application No. 63/009,411, filed Apr. 13, 2020, which is herebyincorporated by reference in its entirety.

BACKGROUND Field of the Disclosure

Aspects of the present disclosure relate to wireless communications, andmore particularly, to techniques for scheduling and bandwidth part (BWP)adaptation for extended reality (XR).

Description of Related Art

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,broadcasts, etc. These wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, etc.). Examples of such multiple-access systems include3rd generation partnership project (3GPP) long term evolution (LTE)systems, LTE Advanced (LTE-A) systems, code division multiple access(CDMA) systems, time division multiple access (TDMA) systems, frequencydivision multiple access (FDMA) systems, orthogonal frequency divisionmultiple access (OFDMA) systems, single-carrier frequency divisionmultiple access (SC-FDMA) systems, and time division synchronous codedivision multiple access (TD-SCDMA) systems, to name a few.

In some examples, a wireless multiple-access communication system mayinclude a number of base stations (BSs), which are each capable ofsimultaneously supporting communication for multiple communicationdevices, otherwise known as user equipments (UEs). In an LTE or LTE-Anetwork, a set of one or more BSs may define an eNodeB (eNB). In otherexamples (e.g., in a next generation, a new radio (NR), or 5G network),a wireless multiple access communication system may include a number ofdistributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radioheads (RHs), smart radio heads (SRHs), transmission reception points(TRPs), etc.) in communication with a number of central units (CUs)(e.g., central nodes (CNs), access node controllers (ANCs), etc.), wherea set of one or more DUs, in communication with a CU, may define anaccess node (e.g., which may be referred to as a BS, next generationNodeB (gNB or gNodeB), TRP, etc.). ABS or DU may communicate with a setof UEs on downlink (DL) channels (e.g., for transmissions from a BS or aDU to a UE) and uplink (UL) channels (e.g., for transmissions from a UEto a BS or a DU).

These multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent wireless devices to communicate on a municipal, national,regional, and even global level. New radio (e.g., 5^(th) generation (5G)NR) is an example of an emerging telecommunication standard. NR is a setof enhancements to the LTE mobile standard promulgated by 3GPP. NR isdesigned to better support mobile broadband Internet access by improvingspectral efficiency, lowering costs, improving services, making use ofnew spectrum, and better integrating with other open standards usingOFDMA with a cyclic prefix (CP) on the DL and on the UL. To these ends,NR supports beamforming, multiple-input multiple-output (MIMO) antennatechnology, and carrier aggregation.

However, as the demand for mobile broadband access continues toincrease, there exists a need for further improvements in NR and LTEtechnology. Preferably, these improvements should be applicable to othermulti-access technologies and the telecommunication standards thatemploy these technologies.

SUMMARY

The systems, methods, and devices of the disclosure each have severalaspects, no single one of which is solely responsible for its desirableattributes. Without limiting the scope of this disclosure as expressedby the claims which follow, some features will now be discussed briefly.After considering this discussion, and particularly after reading thesection entitled “Detailed Description” one will understand how thefeatures of this disclosure provide advantages that include power savingby devices using wireless communications to perform extended reality(XR) functions.

Certain aspects provide a method for wireless communication performed bya user equipment (UE). The method generally includes obtaining anindication to change at least one of a minimumcontrol-channel-to-data-channel delay or a bandwidth for receiving afirst transmission on a bandwidth part (BWP); changing the at least oneof the minimum control-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth; and receiving the first transmission on the BWP using theat least one of the new minimum control-channel-to-data-channel delay orthe new bandwidth of the BWP.

Certain aspects provide a method for wireless communication performed bya network entity. The method generally includes obtaining an indicationto change at least one of a minimum control-channel-to-data-channeldelay or a bandwidth for transmitting a first transmission on a BWP to aUE; changing the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth for the first transmission to the UE; and transmitting thefirst transmission on the BWP using the at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.

Certain aspects provide an apparatus for wireless communications. Theapparatus generally includes a processor configured to: obtain anindication to change at least one of a minimumcontrol-channel-to-data-channel delay or a bandwidth for receiving afirst transmission on a BWP; change the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth; and receive the first transmission on the BWP using theat least one of the new minimum control-channel-to-data-channel delay orthe new bandwidth of the BWP; and a memory coupled with the processor.

Certain aspects provide an apparatus for wireless communications. Theapparatus generally includes a processor configured to: obtain anindication to change at least one of a minimumcontrol-channel-to-data-channel delay or a bandwidth for transmitting afirst transmission on a BWP to a UE; change the at least one of theminimum control-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth for the first transmission to the UE; and transmit thefirst transmission on the BWP using the at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP;and a memory coupled with the processor.

Certain aspects provide an apparatus for wireless communications. Theapparatus generally includes means for obtaining an indication to changeat least one of a minimum control-channel-to-data-channel delay or abandwidth for receiving a first transmission on a BWP; means forchanging the at least one of the minimum control-channel-to-data-channeldelay to a new minimum control-channel-to-data-channel delay or thebandwidth on the BWP to a new bandwidth; and means for receiving thefirst transmission on the BWP using the at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.

Certain aspects provide an apparatus for wireless communications. Theapparatus generally includes means for obtaining an indication to changeat least one of a minimum control-channel-to-data-channel delay or abandwidth for transmitting a first transmission on a BWP to a UE; meansfor changing the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth for the first transmission to the UE; and means fortransmitting the first transmission on the BWP using the at least one ofthe new minimum control-channel-to-data-channel delay or the newbandwidth of the BWP.

Certain aspects provide a computer-readable medium for wirelesscommunications. The computer-readable medium includes instructions that,when executed by a processing system, cause the processing system toperform operations generally including obtaining an indication to changeat least one of a minimum control-channel-to-data-channel delay or abandwidth for receiving a first transmission on a BWP; changing the atleast one of the minimum control-channel-to-data-channel delay to a newminimum control-channel-to-data-channel delay or the bandwidth on theBWP to a new bandwidth; and receiving the first transmission on the BWPusing the at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.

Certain aspects provide a computer-readable medium for wirelesscommunications. The computer-readable medium includes instructions that,when executed by a processing system, cause the processing system toperform operations generally including obtaining an indication to changeat least one of a minimum control-channel-to-data-channel delay or abandwidth for transmitting a first transmission on a BWP to a UE;changing the at least one of the minimum control-channel-to-data-channeldelay to a new minimum control-channel-to-data-channel delay or thebandwidth on the BWP to a new bandwidth for the first transmission tothe UE; and transmitting the first transmission on the BWP using the atleast one of the new minimum control-channel-to-data-channel delay orthe new bandwidth of the BWP.

To the accomplishment of the foregoing and related ends, the one or moreaspects comprise the features hereinafter fully described andparticularly pointed out in the claims. The following description andthe appended drawings set forth in detail certain illustrative featuresof the one or more aspects. These features are indicative, however, ofbut a few of the various ways in which the principles of various aspectsmay be employed.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the manner in which the above-recited features of the presentdisclosure can be understood in detail, a more particular description,briefly summarized above, may be had by reference to aspects, some ofwhich are illustrated in the drawings. It is to be noted, however, thatthe appended drawings illustrate only certain typical aspects of thisdisclosure and are therefore not to be considered limiting of its scope,for the description may admit to other equally effective aspects.

FIG. 1 is a block diagram conceptually illustrating an exampletelecommunications system, in accordance with certain aspects of thepresent disclosure.

FIG. 2 is a block diagram conceptually illustrating a design of anexample a base station (BS) and user equipment (UE), in accordance withcertain aspects of the present disclosure.

FIG. 3 is an example frame format for certain wireless communicationsystems (e.g., new radio (NR)), in accordance with certain aspects ofthe present disclosure.

FIG. 4 is a block diagram illustrating an example architecture of a corenetwork (CN) in communication with a radio access network (RAN), inaccordance with certain aspects of the present disclosure.

FIG. 5 is a table illustrating various fifth generation (5G) qualityindicators, in accordance with certain aspects of the presentdisclosure.

FIG. 6 is a table illustrating various use cases for extended reality(XR), in accordance with certain aspects of the present disclosure.

FIG. 7 illustrates a wireless communication system for XR, in accordancewith certain aspects of the present disclosure.

FIG. 8 shows three transmission timelines, in accordance with certainaspects of the present disclosure.

FIG. 9 is a flow diagram illustrating example operations for wirelesscommunication by a UE, in accordance with certain aspects of the presentdisclosure.

FIG. 10 is a flow diagram illustrating example operations for wirelesscommunication by a (BS, in accordance with certain aspects of thepresent disclosure.

FIG. 11 shows two example transmission timelines showing a UE performingmicrosleep, in accordance with certain aspects of the presentdisclosure.

FIG. 12 illustrates a communications device that may include variouscomponents configured to perform the operations for techniques disclosedherein, in accordance with certain aspects of the present disclosure.

FIG. 13 illustrates a communications device that may include variouscomponents configured to perform the operations for techniques disclosedherein, in accordance with certain aspects of the present disclosure.

To facilitate understanding, identical reference numerals have beenused, where possible, to designate identical elements that are common tothe figures. It is contemplated that elements disclosed in one aspectmay be beneficially utilized on other aspects without specificrecitation.

DETAILED DESCRIPTION

Aspects of the present disclosure provide apparatus, methods, processingsystems, and computer readable mediums for scheduling and bandwidth part(BWP) adaptation for extended reality (XR). In aspects of the presentdisclosure, XR techniques allow the interaction between activities invirtual and real environments. XR includes augmented reality (AR), mixedreality (MR) and virtual reality (VR). An XR device is a mobile device(e.g., a smart glass, a watch, or a cellphone), which may supportwireless data exchange with a server. XR applications may support adynamic reconstruction of 3D environment and/or fusion of real andvirtual environments. The XR applications may require high quality videodata and very low latency. Since the XR device may be wearable andmobile, it is desirable that the XR device may have a good battery life(e.g., one day) and avoid overheating, so users will have a goodexperience.

The following description provides examples of techniques for improvingdownlink (DL) wireless data transfer for XR applications to improvepower efficiency of those DL wireless data transfers and the XRapplications in wireless communication systems. Changes may be made inthe function and arrangement of elements discussed without departingfrom the scope of the disclosure. Various examples may omit, substitute,or add various procedures or components as appropriate. For instance,the methods described may be performed in an order different from thatdescribed, and various steps may be added, omitted, or combined. Also,features described with respect to some examples may be combined in someother examples. For example, an apparatus may be implemented or a methodmay be practiced using any number of the aspects set forth herein. Inaddition, the scope of the disclosure is intended to cover such anapparatus or method which is practiced using other structure,functionality, or structure and functionality in addition to, or otherthan, the various aspects of the disclosure set forth herein. It shouldbe understood that any aspect of the disclosure disclosed herein may beembodied by one or more elements of a claim. The word “exemplary” isused herein to mean “serving as an example, instance, or illustration.”Any aspect described herein as “exemplary” is not necessarily to beconstrued as preferred or advantageous over other aspects.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular radioaccess technology (RAT) and may operate on one or more frequencies. ARAT may also be referred to as a radio technology, an air interface,etc. A frequency may also be referred to as a carrier, a subcarrier, afrequency channel, a tone, a subband, etc. Each frequency may support asingle RAT in a given geographic area in order to avoid interferencebetween wireless networks of different RATs.

The techniques described herein may be used for various wirelessnetworks and radio technologies. While aspects may be described hereinusing terminology commonly associated with 3G, 4G, and/or new radio(e.g., 5G NR) wireless technologies, aspects of the present disclosurecan be applied in other generation-based communication systems.

NR access (e.g., 5G technology) may support various wirelesscommunication services, such as enhanced mobile broadband (eMBB)targeting wide bandwidth (e.g., 80 MHz or beyond), millimeter wave (mmW)targeting high carrier frequency (e.g., 25 GHz or beyond), massivemachine type communications MTC (mMTC) targeting non-backward compatibleMTC techniques, and/or mission critical targeting ultra-reliablelow-latency communications (URLLC). These services may include latencyand reliability requirements. These services may also have differenttransmission time intervals (TTI) to meet respective quality of service(QoS) requirements. In addition, these services may co-exist in the samesubframe.

The electromagnetic spectrum is often subdivided, based onfrequency/wavelength, into various classes, bands, channels, etc. In 5GNR two initial operating bands have been identified as frequency rangedesignations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Thefrequencies between FR1 and FR2 are often referred to as mid-bandfrequencies. Although a portion of FR1 is greater than 6 GHz, FR1 isoften referred to (interchangeably) as a “Sub-6 GHz” band in variousdocuments and articles. A similar nomenclature issue sometimes occurswith regard to FR2, which is often referred to (interchangeably) as a“millimeter wave” band in documents and articles, despite beingdifferent from the extremely high frequency (EHF) band (30 GHz-300 GHz)which is identified by the International Telecommunications Union (ITU)as a “millimeter wave” band.

With the above aspects in mind, unless specifically stated otherwise, itshould be understood that the term “sub-6 GHz” or the like if usedherein may broadly represent frequencies that may be less than 6 GHz,may be within FR1, or may include mid-band frequencies. Further, unlessspecifically stated otherwise, it should be understood that the term“millimeter wave” or the like if used herein may broadly representfrequencies that may include mid-band frequencies, may be within FR2, ormay be within the EHF band.

NR supports beamforming and beam direction may be dynamicallyconfigured. Multiple input multiple output (MIMO) transmissions withprecoding may also be supported. MIMO configurations in a downlink (DL)may support up to 8 transmit antennas with multi-layer DL transmissionsup to 8 streams and up to 2 streams per UE. Multi-layer transmissionswith up to 2 streams per UE may be supported. Aggregation of multiplecells may be supported with up to 8 serving cells.

Example Wireless Communications System

FIG. 1 illustrates an example wireless communication network 100 inwhich aspects of the present disclosure may be performed. For example,the wireless communication network 100 may include one or more basestations (BSs) 110 and/or one or more user equipments (UEs) 120configured to execute techniques for scheduling and bandwidth part (BWP)adaptation for extended reality (XR). As shown in FIG. 1, a UE 120 aincludes a XR ADAPT manager 122 that may be configured to performoperations 900 of FIG. 9. ABS 110 a includes a XR ADAPT manager 112 thatmay be configured to perform operations 1000 of FIG. 10.

The wireless communication network 100 may be a new radio (NR) system(e.g., a 5^(th) generation (5G) NR network). As shown in FIG. 1, thewireless communication network 100 may be in communication with a corenetwork (CN) 132. The CN 132 may in communication with one or more BSs110 a-z (each also individually referred to herein as a BS 110 orcollectively as BSs 110) and/or UEs 120 a-y (each also individuallyreferred to herein as a UE 120 or collectively as UEs 120) in thewireless communication network 100 via one or more interfaces.

The BS 110 may provide communication coverage for a particulargeographic area, sometimes referred to as a “cell”, which may bestationary or may move according to the location of a mobile BS 110. Insome examples, multiple BSs 110 may be interconnected to one anotherand/or to one or more other BSs or network nodes (not shown) in wirelesscommunication network 100 through various types of backhaul interfaces(e.g., a direct physical connection, a wireless connection, a virtualnetwork, or the like) using any suitable transport network. In theexample shown in FIG. 1, the BSs 110 a, 110 b and 110 c may be macro BSsfor the macro cells 102 a, 102 b and 102 c, respectively. The BS 110 xmay be a pico BS for a pico cell 102 x. The BSs 110 y and 110 z may befemto BSs for the femto cells 102 y and 102 z, respectively. The BS 110may support one or multiple cells.

The BSs 110 communicate with the UEs 120 in the wireless communicationnetwork 100. The UEs 120 (e.g., 120 x, 120 y, etc.) may be dispersedthroughout the wireless communication network 100, and each UE 120 maybe stationary or mobile. The wireless communication network 100 may alsoinclude relay stations (e.g., a relay station 110 r), also referred toas relays or the like, that receive a transmission of data and/or otherinformation from an upstream station (e.g., a BS 110 a or a UE 120 r)and sends a transmission of the data and/or other information to adownstream station (e.g., a UE 120 or a BS 110), or that relaystransmissions between the UEs 120, to facilitate communication betweenwireless devices.

A network controller 130 may be in communication with a set of BSs 110and provide coordination and control for these BSs 110 (e.g., via abackhaul). In aspects, the network controller 130 may be incommunication with the CN 132 (e.g., a 5G core network (5GC)), whichprovides various network functions such as access and mobilitymanagement, session management, user plane function, policy controlfunction, authentication server function, unified data management,application function, network exposure function, network repositoryfunction, network slice selection function, etc.

A radio access network (RAN) may include the network controller 160 andthe BS 110. The RAN may be in communication with the CN 132 and anapplication server (AS). According to certain aspects, the BSs 110 andthe UEs 120 may be configured for one or more services involving trafficflows between the application provider (e.g., the AS) and/or the BSs 110and the UEs 120 associated with one or more applications running on theUEs 120. For example, the UE 120 a may be requesting admission (e.g.,requesting the BS 110 a to serve as a link between the UE 120 a and theAS) for the one or more traffic flows for a service related to anapplication.

The wireless communication network 100 may also include relay stations.A relay station is a station that receives a transmission of data and/orother information from an upstream station (e.g., a BS 110 or a UE 120)and sends a transmission of the data and/or other information to adownstream station (e.g., a UE 120 or a BS 110). A relay station mayalso be a UE 120 that relays transmissions for other UEs 120. In theexample shown in FIG. 1, a relay station 110 r may communicate with a BS110 a and a UE 120 r in order to facilitate communication between the BS110 a and the UE 120 r. A relay station may also be referred to as arelay BS, a relay, etc.

The wireless communication network 100 may be a heterogeneous networkthat includes BSs 110 of different types, e.g., macro BS, pico BS, femtoBS, relays, etc. These different types of BSs 110 may have differenttransmit power levels, different coverage areas, and different impact oninterference in the wireless communication network 100. For example,macro BS may have a high transmit power level (e.g., 20 Watts) whereaspico BS, femto BS, and relays may have a lower transmit power level(e.g., 1 Watt).

The wireless communication network 100 may support synchronous orasynchronous operation. For synchronous operation, BSs 110 may havesimilar frame timing, and transmissions from different BSs 110 may beapproximately aligned in time. For asynchronous operation, the BSs 110may have different frame timing, and transmissions from different BSs110 may not be aligned in time. The techniques described herein may beused for both synchronous and asynchronous operation.

In FIG. 1, a solid line with double arrows indicates desiredtransmissions between a UE 120 and a serving BS 110, which is the BS 110designated to serve the UE 120 on a downlink (DL) and/or an uplink (UL).A finely dashed line with double arrows indicates potentiallyinterfering transmissions between the UE 120 and the BS 110.

FIG. 2 illustrates example components of a BS 110 a and a UE 120 a(e.g., in the wireless communication network 100 of FIG. 1).

At the BS 110 a, a transmit processor 220 may receive data from a datasource 212 and control information from a controller/processor 240. Thecontrol information may be for a physical broadcast channel (PBCH), aphysical control format indicator channel (PCFICH), a physical hybridARQ (automatic repeat request) indicator channel (PHICH), a physicaldownlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc.The data may be for a physical downlink shared channel (PDSCH), etc. Amedium access control-control element (MAC-CE) is a MAC layercommunication structure that may be used for control command exchangebetween wireless nodes. The MAC-CE may be carried in a shared channelsuch as a PDSCH, a physical uplink shared channel (PUSCH), or a physicalsidelink shared channel (PSSCH).

The transmit processor 220 may process (e.g., encode and symbol map) thedata and control information to obtain data symbols and control symbols,respectively. The transmit processor 220 may also generate referencesymbols, such as for a primary synchronization signal (PSS), a secondarysynchronization signal (SSS), and a channel state information referencesignal (CSI-RS). A transmit multiple-input multiple-output (MIMO)processor 230 may perform spatial processing (e.g., precoding) on thedata symbols, the control symbols, and/or the reference symbols, ifapplicable, and may provide output symbol streams to modulators (MODs)in transceivers 232 a-232 t. Each MOD in transceivers 232 a-232 t mayprocess a respective output symbol stream (e.g., for orthogonalfrequency division multiplexing (OFDM), etc.) to obtain an output samplestream. Each MOD in transceivers 232 a-232 t may further process (e.g.,convert to analog, amplify, filter, and up convert) the output samplestream to obtain a DL signal. The DL signals from the MODs intransceivers 232 a-232 t may be transmitted via antennas 234 a-234 t,respectively.

At the UE 120 a, antennas 252 a-252 r may receive DL signals from the BS110 a and may provide received signals to demodulators (DEMODs) intransceivers 254 a-254 r, respectively. Each DEMOD in the transceiver254 may condition (e.g., filter, amplify, down convert, and digitize) arespective received signal to obtain input samples. Each DEMOD in thetransceiver 254 may further process the input samples (e.g., for OFDM,etc.) to obtain received symbols. A MIMO detector 256 may obtainreceived symbols from all the DEMODs in the transceivers 254 a-254 r,perform MIMO detection on the received symbols if applicable, andprovide detected symbols. A receive processor 258 may process (e.g.,demodulate, deinterleave, and decode) the detected symbols, providedecoded data for the UE 120 a to a data sink 260, and provide decodedcontrol information to a controller/processor 280.

On an UL, at the UE 120 a, a transmit processor 264 may receive andprocess data (e.g., for a PUSCH) from a data source 262 and controlinformation (e.g., for a physical uplink control channel (PUCCH) fromthe controller/processor 280. The transmit processor 264 may alsogenerate reference symbols for a reference signal (e.g., for a soundingreference signal (SRS)). The symbols from the transmit processor 264 maybe precoded by a transmit MIMO processor 266 if applicable, furtherprocessed by the MODs in transceivers 254 a-254 r (e.g., for SC-FDM,etc.), and transmitted to the BS 110 a. At the BS 110 a, the UL signalsfrom the UE 120 a may be received by the antennas 234, processed by theDEMODs in transceivers 232, detected by a MIMO detector 236 ifapplicable, and further processed by a receive processor 238 to obtaindecoded data and control information sent by the UE 120 a. The receiveprocessor 238 may provide the decoded data to a data sink 239 and thedecoded control information to the controller/processor 240.

Memories 242 and 282 may store data and program codes for the BS 110 aand the UE 120 a, respectively. A scheduler 244 may schedule the UE 120a for data transmission on a DL and/or an UL.

Antennas 252, processors 266, 258, 264, and/or controller/processor 280of the UE 120 a and/or antennas 234, processors 220, 230, 238, and/orcontroller/processor 240 of the BS 110 a may be used to perform thevarious techniques and methods described herein. For example, as shownin FIG. 2, the controller/processor 240 of the BS 110 a has a XR ADAPTmanager 241 that may be configured to perform the operations illustratedin FIG. 10, as well as other operations disclosed herein. As shown inFIG. 2, the controller/processor 280 of the UE 120 a has a XR ADAPTmanager 281 that may be configured to perform the operations illustratedin FIG. 9, as well as other operations disclosed herein. Although shownat the controller/processor, other components of the UE 120 a and the BS110 a may be used to perform the operations described herein.

NR may utilize OFDM with a cyclic prefix (CP) on the UL and the DL. TheNR may support half-duplex operation using time division duplexing(TDD). The OFDM and single-carrier frequency division multiplexing(SC-FDM) partition system bandwidth into multiple orthogonalsubcarriers, which are also commonly referred to as tones, bins, etc.Each subcarrier may be modulated with data. Modulation symbols may besent in a frequency domain with the OFDM and in a time domain with theSC-FDM. The spacing between adjacent subcarriers may be fixed, and atotal number of subcarriers may be dependent on the system bandwidth.The minimum resource allocation, called a resource block (RB), may be 12consecutive subcarriers. The system bandwidth may also be partitionedinto subbands. For example, a subband may cover multiple RBs. The NR maysupport a base subcarrier spacing (SCS) of 15 KHz and other SCS may bedefined with respect to the base SCS (e.g., 30 kHz, 60 kHz, 120 kHz, 240kHz, etc.).

FIG. 3 is a diagram showing an example of a frame format 300 for NR. Atransmission timeline for each of DL and UL may be partitioned intounits of radio frames. Each radio frame may have a predeterminedduration (e.g., 10 ms), and may be partitioned into 10 subframes, eachof 1 ms, with indices of 0 through 9. Each subframe may include avariable number of slots (e.g., 1, 2, 4, 8, 16, . . . slots) dependingon a SCS. Each slot may include a variable number of symbol periods(e.g., 7, 12, or 14 symbols) depending on the SCS. Symbol periods ineach slot may be assigned indices. A sub-slot structure may refer to atransmit time interval having a duration less than a slot (e.g., 2, 3,or 4 symbols). Each symbol in a slot may be configured for a linkdirection (e.g., a DL, an UL, or a flexible) for data transmission, andthe link direction for each subframe may be dynamically switched. Thelink directions may be based on the slot format. Each slot may includeDL/UL data as well as DL/UL control information.

In NR, a synchronization signal block (SSB) is transmitted. In certainaspects, SSBs may be transmitted in a burst where each SSB in the burstcorresponds to a different beam direction for UE-side beam management(e.g., including beam selection and/or beam refinement). The SSBincludes a PSS, a SSS, and a two symbol PBCH. The SSB can be transmittedin a fixed slot location, such as the symbols 0-3 as shown in FIG. 3.The PSS and the SSS may be used by UEs for cell search and acquisition.The PSS may provide half-frame timing, a synchronization signal (SS) mayprovide a CP length and frame timing. The PSS and the SSS may providecell identity. The PBCH carries some basic system information, such asDL system bandwidth, timing information within radio frame, SS burst setperiodicity, system frame number, etc. The SSBs may be organized into SSbursts to support beam sweeping. Further system information such as,remaining minimum system information (RMSI), system information blocks(SIBs), other system information (OSI) can be transmitted on a PDSCH incertain subframes. The SSB can be transmitted up to sixty-four times,for example, with up to sixty-four different beam directions for mmWave.The multiple transmissions of the SSB are referred to as a SS burst set.The SSBs in an SS burst set may be transmitted in the same frequencyregion, while the SSBs in different SS bursts sets can be transmitted atdifferent frequency regions.

FIG. 4 is a block diagram illustrating an example architecture of a CN400 (e.g., such as the CN 132 in FIG. 1) in communication with a RAN 424and an AS 402, in accordance with certain aspects of the presentdisclosure. As shown in FIG. 4, the example architecture includes the CN400, the RAN 424, a UE 422, and a data network (DN) 428 (e.g. operatorservices, Internet access or third party services).

The CN 400 may host core network functions. The CN 400 may be centrallydeployed. The CN 400 functionality may be offloaded (e.g., to advancedwireless services (AWS)), in an effort to handle peak capacity. As shownin FIG. 4, the CN 400 may be implemented by one or more network entitiesthat perform network functions (NF) including Network Slice SelectionFunction (NSSF) 404, Network Exposure Function (NEF) 406, NF RepositoryFunction (NRF) 408, Policy Control Function (PCF) 410, Unified DataManagement (UDM) 412, Application Function (AF) 414, AuthenticationServer Function (AUSF) 416, Access and Mobility Management Function(AMF) 418, Session Management Function (SMF) 420; User Plane Function(UPF) 426, and various other functions (not shown) such as UnstructuredData Storage Function (UDSF); Unified Data Repository (UDR);5G-Equipment Identity Register (5G-EIR); and/or Security Edge ProtectionProxy (SEPP).

The AMF 418 may include the following functionality (some or all of theAMF 418 functionalities may be supported in one or more instances of theAMF 418): termination of RAN control plane (CP) interface (N2);termination of non-access stratum (NAS) (e.g., N1), NAS ciphering andintegrity protection; registration management; connection management;reachability management; mobility management; lawful intercept (for AMFevents and interface to L1 system); transport for session management(SM) messages between the UE 422 and the SMF 420; transparent proxy forrouting SM messages; access authentication; access authorization;transport for short message service (SMS) messages between the UE 422and a SMS function (SMSF); Security Anchor Functionality (SEAF);Security Context Management (SCM), which receives a key from the SEAFthat it uses to derive access-network specific keys; Location Servicesmanagement for regulatory services; transport for Location Servicesmessages between the UE 422 and a location management function (LMF) aswell as between the RAN 424 and LMF; evolved packet service (EPS) bearerID allocation for interworking with EPS; and/or UE mobility eventnotification; and/or other functionality.

The SMF 420 may support: session management (e.g., sessionestablishment, modification, and release), UE IP address allocation andmanagement, dynamic host configuration protocol (DHCP) functions,termination of NAS signaling related to session management, downlinkdata notification, and traffic steering configuration for UPF for propertraffic routing. The UPF 426 may support: packet routing and forwarding,packet inspection, quality-of-service (QoS) handling, external protocoldata unit (PDU) session point of interconnect to DN 228, and anchorpoint for intra-RAT and inter-RAT mobility. The PCF 410 may support:unified policy framework, providing policy rules to control protocolfunctions, and/or access subscription information for policy decisionsin UDR. The AUSF 416 may acts as an authentication server. The UDM 412may support: generation of Authentication and Key Agreement (AKA)credentials, user identification handling, access authorization, andsubscription management. The NRF 408 may support: service discoveryfunction, and maintain NF profile and available NF instances. NSSF maysupport: selecting of the Network Slice instances to serve the UE 422,determining the allowed network slice selection assistance information(NSSAI), and/or determining the AMF set to be used to serve the UE 422.

The NEF 406 may support: exposure of capabilities and events, secureprovision of information from external application to 3GPP network,translation of internal/external information. The AF 414 may support:application influence on traffic routing, accessing. The NEF 406, and/orinteraction with policy framework for policy control.

As shown in FIG. 4, the CN 400 may be in communication with the AS 402,the UE 422, the RAN 424, and the DN 428. In some examples, the CN 200communicates with the AS 402 via the NEF 406 and/or the AF 414.

Example Services and QoS Parameters

A communication system such as a wireless communication network (e.g.,such as the wireless communication network 100 or the RAN 424) mayprovide communication services to a user equipment (UE) (e.g., the UE120 or the UE 422). For example, 5^(th) generation (5G) new radio (NR)may support services such as enhanced mobile broadband (eMBB) servicetargeting wide bandwidth (e.g., 80 MHz or beyond), ultra-reliablelow-latency communication (URLLC) service, and others services includingextended reality (XR) services discussed in more detail below. Theservices may include latency and reliability requirements. The servicesmay have different transmission time intervals (TTI) to meet respectivequality of service (QoS) requirements.

Traffic requirements for a service may be summarized via a set ofparameters (e.g., QoS parameters) and associated with a traffic flowthat supports the service. The parameters may include a packet errorrate (PER), a packet delay budget (PDB), and/or a guaranteed bit rate(GBR). The PER may be a ratio, in percent, of successfully receivedpackets. For example, the PER may define an upper bound for a rate ofprotocol data units (PDUs) (e.g. IP packets) that have been processed bythe sender of a link layer protocol (e.g. a radio link control (RLC) ina radio access network (RAN) of a 3rd generation partnership project(3GPP) access) but that are not successfully delivered by thecorresponding receiver to the upper layer (e.g. a packet dataconvergence protocol (PDCP) in RAN of a 3GPP access). Thus, the PER maydefine an upper bound for a rate of non-congestion related packetlosses. PDB may be defined as an upper bound for the time that a packetmay be delayed between the UE (e.g., UE 422) and the UPF (e.g., UPF 426)on a core network (CN) side. The GBR may indicate the bandwidth (bitrate) to be guaranteed b the network.

A resource type may determine if dedicated network resources related toa QoS flow-level guaranteed flow bit rate (GFBR) value are permanentlyallocated (e.g., by an admission control function in a radio basestation (BS)), while a non-GBR QoS flow may be pre-authorized throughstatic policy and charging control. A GBR QoS flow may use either theGBR resource type or the Delay-critical GBR resource type. For trafficflows of type “Delay critical GBR” (e.g., for URLLC traffic flows), aparameter called Maximum Data Burst Volume (MDBV) is specified todescribe the traffic burst. The MDBV denotes the largest amount of datathat the 5G-AN is required to serve within a period of 5G-AN PDB (e.g.,5G-AN part of the PDB). The MDBV may be signaled together with astandardized indicator value (e.g., 5QI to the RAN (e.g., the RAN 424 ofFIG. 4), and if it is received, it shall be used instead of the defaultvalue.

The Table 500 in FIG. 5 shows example QoS parameters that may beconfigured for various services. In some examples, a conversationalvoice service, a conversational video service (e.g., such as livestreaming), and a video service (e.g., such as buffered streaming)and/or TCP-based service (e.g., such as the World Wide Web, email, chat,ftp, p2p file sharing, progressive video, etc.) may be associated witheMBB service. In some examples, a remote control service (e.g., a UEbeing operated remotely, either by a human or a computer, such as aremote driver or a vehicle to everything (V2X) application to operate aremote vehicle with no driver or a remote vehicle located in a dangerousenvironment) may be associated with URLCC. In some examples, low-latencyeMBB applications may be associated with XR service. The XR service mayrefer to services such augmented reality (AR), virtual reality (VR), andcloud gaming. The AR and VR services may be characterized by a humanbeing interacting with the environment or people, or controlling the UE,and relying on audio-visual feedback. In the use cases like the VR andinteractive conversation the latency requirements include the latenciesat the application layer (e.g., codecs), which could be specifiedoutside of 3GPP.

The QoS parameters and services shown in the Table 500 in FIG. 5 aremerely illustrative, and various other QoS parameters and services maybe specified.

At high PDB values (e.g., equal to or exceeding 100 ms), the burst of atraffic over the PDB range may be closely approximated by the GBR*PDB.For some traffic flows, measured over every PDB, the percentile of timeswhen the burst exceeds GBR*PDB is small relative to the PER. Droppingpackets of such bursts will have negligible effect on the PER of thetraffic. Thus, for such traffic flows it may not be important to conveythe size of the traffic burst. However, for traffic flows at low PDB andlow PER values, the volume of traffic that the 5G system handles can bemuch higher than GBR*PDB. In this case, it is useful to describe thetraffic burst.

As mentioned above, the MDBV is specified for the traffic flows of type“Delay critical GBR” which are expected to handle traffic of lowthroughput. Thus, in some cases the range of values for the MDBV iscapped at 4095 Bytes (e.g., when signaled on 5G network interfaces).Even with a PDB of 1 ms, the throughout cap of 4095 Bytes implies thatthe maximum throughput on that flow can be no more than 4095 Bytes/ms(i.e., around 32.76 Mbps). The supported throughput may be even lower ontraffic flows with larger PDB values. However, for certain services,such as XR services (e.g., AR, VR, cloud gaming), the throughputrequirements (e.g., up to 250 Mbps) and PDB requirements (e.g., 25 ms)can be higher.

Example Extended Reality

New Radio (NR) is an emerging wireless communications technology underdevelopment in conjunction with the 5G Technology Forum (SGTF). NRaccess (e.g., 5G NR) may support various wireless communicationservices, such as enhanced mobile broadband (eMBB) targeting widebandwidth (e.g., 80 MHz or beyond), millimeter wave (mmW) targeting highcarrier frequency (e.g., 25 GHz or beyond), massive machine typecommunications MTC (mMTC) targeting non-backward compatible MTCtechniques, and/or mission critical targeting ultra-reliable low-latencycommunications (URLLC). The wireless communication services may includea latency (e.g., a file delay budget (FDB) and/or a packet delay budget(PDB)) and reliability requirements (e.g., a file error rate (FER)and/or a packet error rate (PER)), and may also have differenttransmission time intervals (TTI) to meet respective quality of service(QoS) requirements. Extended reality (XR) is wireless communicationservice for services requiring low latency (e.g., a PDB of between 5 msand 25 ms) and high bit-rate (e.g., a PER of less than or equal to1e−3).

FIG. 6 shows a table 600 illustrating various use cases for XR. Forexample, virtual reality (VR) may be used for cloud gaming, VR splitrendering, and augmented reality (AR) split computations. Cloud gaminggenerally refers to gaming on a user device where at least some of agraphical processor unit (GPU) processing is performed on a cloud serverwhere more powerful GPUs may be implemented. Similarly, GPU processingfor the VR and the AR may be split between the GPU on the cloud and theGPU on the user device. However, cloud gaming, split rendering, andsplit computation services require low latency to maintain an acceptablegaming experience. As illustrated, the cloud gaming may be implementedusing QoS or over a top (OTT) on a 5G network. Moreover, different usecases may have different location and mobility requirements.

According to aspects of the present disclosure, power consumption by ARdevices may be a challenge to their usefulness. To be a usefulaugmentation to smartphones, it is desirable for battery life of the ARdevices (e.g., an AR glass such as an AR glass 726 shown in FIG. 7) tomatch the expectation for smartphone battery life (i.e. one full day ofuse between charges). However, a design constraint for the AR glass isthat battery capacity is severely limited, because the proximity of theAR glass to the user's forehead makes preventing high temperatures(i.e., of the battery) desirable.

In aspects of the present disclosure, an AR glass physically tethered toa smartphone may be a successful design given the technologicalconstraints. Power requirements may still be challenging for thedescribed form-factor, in part due to a potential 2-watt powerbudget_for the AR glass, including power for a system on chip (SoC)(e.g., a graphics processing unit (GPU), a central processing unit(CPU), and/or memory), a display, a camera, and/or sensors.

FIG. 7 illustrates a wireless communication system 700 (e.g., a 5Gsystem) for XR. As illustrated, the wireless communication system 700may include a UE 720 (e.g., such as the UE 120 of FIG. 1), a radioaccess network (RAN) 702 (e.g., such as wireless communication network100 of FIG. 1) including a BS 710 (e.g., such as the BS 110 of FIG. 1),and Internet 712. In certain aspects, the UE 720 may be associated withor tethered to an AR glass 726 via, for example, a universal serial bus(USB) interface 722, for VR or AR applications. As illustrated, the 5Gsystem 700 may communicate with an edge cloud server 750, which mayinclude logic entities such as an XR edge data network (DN) 728 and anXR edge application function 724. An edge cloud server 750 refers to acloud server located closer to the UE 720, allowing communication ofdata with lower latency for various applications as described herein.For example, CN to XR edge server latency may be negligible as comparedto the 5G system 700 latency. The edge cloud server 750 may beassociated with an XR public cloud AF 730.

According to aspects of the present disclosure, XR downlink (DL) trafficmay be H.264 and/or H.265 encoded video. This video may bequasi-periodic, with a burst for every frame and thus a burst rate inbursts per second equal to a frame rate of the video in frames persecond (fps). Alternatively, this video may be quasi-periodic, with twopossibly staggered “eye-buffers” per frame and thus the burst rate inthe bursts per second equal to 2 times the frame rate in fps.

In aspects of the present disclosure, frames can be split into multiplefiles, with each file may be processed separately.

According to aspects of the present disclosure, files of each frame canbe intra-coded (i.e., I frames), predicted (i.e., P frames), orbi-directional predicted (i.e., B frames). The I-frame may include acomplete video frame or image, like a JPG or BMP image file. On thecontrary, the P-frame may include only changes in an image from aprevious frame. For example, only portions of the image that havechanged since the previous frame are encoded, whereas unchanging pixelsin the frame (e.g., background) are not stored by an encoder, thussaving space. Accordingly, the I frame is larger (e.g., in number ofbits) than the P frame. The B-frame saves even more space by usingdifferences between a current frame and both preceding and followingframes to specify its content. Accordingly, the B frame may be smallerthan the I frame and the P frame.

In aspects of the present disclosure, uplink (UL) transmissions forcloud gaming applications include controller information, while for VRsplit rendering the UL transmissions may include controller informationand user pose information.

According to aspects of the present disclosure, periodicity of ULtransmissions can be higher than DL transmissions, to convey latestinformation from a controller to a server.

In aspects of the present disclosure, AR split computation architecturesmay include a second flow for AR UL transmissions, for computer vision(e.g., to determine user pose information), on an edge and/or a cloud.

FIG. 8 shows a transmission timeline 800, according to certain aspectsof the present disclosure. The transmission timeline 800 shows XR DLtraffic. As noted above, the XR DL traffic may show a quasi-periodicpattern because underlying data frames are generated quasi-periodically.The frame rate is typically 120 or 60 Hz, which correspond tointer-frame intervals of 8.3 ms and 16.7 ms (as shown at 850). Thetransmission timeline 800 illustrates how bursts can vary in size, witha burst for an I frame at 805 and the burst for a P frame at 810.

Connected discontinuous reception (C-DRX) can be configured for powerefficient communication. In the C-DRX operation, a UE periodically wakesup (e.g., powers-on a receiver) to receive data. To configure the C-DRXfor power-efficient communication of XR frames, it is desirable for aperiodicity of the C-DRX to match an inter-frame interval of the XRapplication. In the described C-DRX operations, the UE goes to sleep(e.g., powers-off the receiver or part of the receiver) once frame datais received. Each frame may consist of several slices that can betransmitted over multiple slots. Together the slices compose a databurst.

In aspects of the present disclosure, a delay requirement (e.g., a 10 msdelay budget as shown at 825) for XR operations is stricter than a filetransfer protocol (FTP) download or web browsing delay budget.

According to aspects of the present disclosure, data for a frame shouldbe successfully received within one DRX cycle if C-DRX is configured ona UE.

In Rel-15, K0 (i.e., control-channel-to-data-channel delay for aphysical downlink shared channel (PDSCH)) values, which can be indicatedin scheduling downlink control information (DCI), can be radio resourcecontrol (RRC)-configured in a time domain resource allocation (TDRA)table and a specific K0 value may be indicated in the scheduling DCI. AgNB can ensure that all configured K0 values are non-zero. A UE can thenfind a minimum of all K0 values and check that a minimum K0 is non-zero,and if so, the UE can execute extended microsleep. In Rel-16, anexplicit threshold for a minimum K0 can be configured. The abovediscussion can also be applied to K2 (i.e.,control-channel-to-data-channel delay for a physical uplink sharedchannel (PUSCH)) in a similar manner. That is, in Rel-15, K2 (i.e.,control-channel-to-data-channel delay for PUSCH) values, which can beindicated in scheduling DCI, can be RRC-configured in a TDRA table. ThegNB can ensure that all configured K2 values are greater than someminimum non-zero value. A UE can then find a minimum of all K2 valuesand check that it is greater than some minimum non-zero value tofacilitate power saving. In Rel-16, an explicit threshold for a minimumK2 can be configured.

According to aspects of the present disclosure, it is desirable to saveUE power as much as possible, while causing a minimal impact to alatency of communications. It is also desirable to take into accountdiverse communication environments, e.g., single or multiple XR UEs in acell. The existing (e.g., used in Rel-15) C-DRX design does not considerspecific characteristics and requirements of XR traffic. UE behavior isfixed across an entire active time duration of a DRX cycle.

In aspects of the present disclosure, with a minimumcontrol-channel-to-data-channel delay of 1 slot, a UE may still performphysical downlink control channel (PDCCH) monitoring in each slot duringperiods between traffic bursts. Thus, it is desirable to develop moreimprovements for XR operations.

Example Scheduling Offset and Bandwidth Part Adaptation for ExtendedReality

According to aspects of the present disclosure, one or more techniquesmay be implemented for improving downlink (DL) wireless data transferfor extended reality (XR) applications to increase power efficiency ofthe DL wireless data transfers and the XR applications. In aspects ofthe present disclosure, user equipment (UE) power saving and latencyjoint optimization techniques are provided that result in reduced powerconsumption with latency appropriate for the XR applications.

According to aspects of the present disclosure, K0 may be adapted (e.g.,changed on a dynamic basis) to support XR communications.

In aspects of the present disclosure, a bandwidth of a bandwidth part(BWP) may be adapted to support XR communications.

According to aspects of the present disclosure, related configurationparameter values (e.g., K0 or bandwidth) can be configured or indicatedby a network entity (e.g., a base station (BS)) based on radio resourcecontrol (RRC) signaling, medium access control-control elements(MAC-CEs), or in a downlink control information (DCI).

In aspects of the present disclosure, related configuration parametervalues can be autonomously adjusted by a UE according to stages of acommunication process.

In certain aspects, K0 is a slot offset between a scheduling DCI and acorresponding scheduled physical downlink shared channel (PDSCH). Inaspects of the present disclosure, K0 adaptation can be realized byswitching between same-slot scheduling where the scheduling DCI and thescheduled PDSCH are in the same slot (i.e., K0=0), and cross-slotscheduling where the scheduling DCI and the scheduled PDSCH are indifferent slots (i.e., K0>0). The same-slot scheduling results in alower latency and a relatively higher power consumption when and thecross-slot scheduling results in a lower power consumption and arelatively higher latency.

According to aspects of the present disclosure, a BWP is a capsule ofmany configurations. Among the configurations is a bandwidth used fortransmission and reception of a signal. A larger BWP bandwidth resultsin a lower latency and a relatively high power consumption when comparedwith a smaller BWP bandwidth that results in a lower power consumptionand a relatively higher latency.

In aspects of the present disclosure, for transmissions of sameinformation data within a hybrid automatic retransmission request (HARQ)process, K0 is set greater than 0 (i.e., cross-slot scheduling) forfirst M transmissions (e.g., M=1 if only a first or a new transmission)of the same information data within the HARQ process and K0 is set to 0is used for subsequent retransmissions.

According to aspects of the present disclosure, setting K0 greater than0 allows a UE to go to sleep (e.g., micro-sleep) after receiving aphysical downlink control channel (PDCCH) without storing samples for apotential PDSCH allocation (i.e., a potential PDSCH allocation in thereceived PDCCH) before a scheduling PDCCH is decoded. As a result, theUE can save power with K0>0 by switching off a receiver of the UE afterreceiving the PDCCH.

In aspects of the present disclosure, a UE can use cross-slot schedulingfor power saving when a latency requirement is not urgent for first Mtransmissions of same information data within a HARQ process. If the UEcannot successfully decode the first M transmissions, then a networkentity switches scheduling to a same-slot scheduling to avoid additionaldelay in the UE receiving the transmission.

FIG. 9 is a flow diagram illustrating example operations 900 forwireless communication, in accordance with certain aspects of thepresent disclosure. The operations 900 may be performed, for example, bya UE (e.g., such as the UE 120 a in the wireless communication network100 of FIG. 1). The operations 900 may be implemented as softwarecomponents that are executed and run on one or more processors (e.g.,the controller/processor 280 of FIG. 2). Further, the transmission andreception of signals by the UE in operations 900 may be enabled, forexample, by one or more antennas (e.g., the antennas 252 of FIG. 2). Incertain aspects, the transmission and/or reception of signals by the UEmay be implemented via a bus interface of one or more processors (e.g.,the controller/processor 280) obtaining and/or outputting signals.

The operations 900 may begin, at 905, by obtaining an indication tochange at least one of a minimum control-channel-to-data-channel delayor a bandwidth for receiving a first transmission on a BWP.

At 910, the UE changes the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth.

At 915, the UE receives the first transmission on the BWP using at leastone of the new minimum control-channel-to-data-channel delay or the newbandwidth of the BWP.

In certain aspects, a UE receives a first configuration of a first BWPand a second configuration of a second BWP. The first BWP is configuredfor a lower traffic rate and the second BWP is configured for a highertraffic rate. The UE obtains an indication to switch from the first BWPto the second BWP. The UE switches from the first BWP to the second BWPin response to obtaining the indication.

According to aspects of the present disclosure, a UE changing at leastone of a minimum control-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay may include changing from a firstnumber of slots to a second number of slots smaller than the firstnumber.

In aspects of the present disclosure, a UE changing a bandwidth of a BWPto a new bandwidth may include changing from a first bandwidth to asecond bandwidth that is larger than the first bandwidth.

According to aspects of the present disclosure, a UE obtaining anindication may include receiving a new minimumcontrol-channel-to-data-channel delay or a new bandwidth on a BWP in atleast one of a RRC signal, a MAC-CE or a DCI.

In aspects of the present disclosure, a UE obtaining an indication mayinclude the UE determining to change a minimumcontrol-channel-to-data-channel delay or to change a bandwidth of a BWP.

According to aspects of the present disclosure, a UE obtaining anindication may include the UE sending a negative acknowledgment (NACK)in response to a receiving a retransmission. In some such aspects,obtaining the indication may include receiving a threshold number ofretransmissions.

In aspects of the present disclosure, a UE obtaining an indication mayinclude the UE receiving a threshold number of second transmissions. Insuch aspects of the present disclosure, the UE receiving the thresholdnumber of second transmissions may include the UE receiving thethreshold number of second transmissions during an active portion of aconnected mode discontinuous reception (C-DRX) configuration.

FIG. 10 is a flow diagram illustrating example operations 1000 forwireless communication, in accordance with certain aspects of thepresent disclosure. The operations 1000 may be performed, for example,by a network entity (e.g., such as the BS 110 a in the wirelesscommunication network 100 of FIG. 1). The operations 1000 may becomplimentary to the operations 900 performed by a UE. The operations1000 may be implemented as software components that are executed and runon one or more processors (e.g., the controller/processor 240 of FIG.2). Further, the transmission and reception of signals by the BS inoperations 900 may be enabled, for example, by one or more antennas(e.g., the antennas 234 of FIG. 2). In certain aspects, the transmissionand/or reception of signals by the BS may be implemented via a businterface of one or more processors (e.g., the controller/processor 240)obtaining and/or outputting signals.

The operations 1000 may begin, at 1005, by obtaining an indication tochange at least one of a minimum control-channel-to-data-channel delayor a bandwidth for transmitting a first transmission on a BWP to a UE.

At 1010, the network entity changes the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth for the first transmission to the UE.

At 1015, the network entity transmits the first transmission on the BWPusing at least one of the new minimum control-channel-to-data-channeldelay or the new bandwidth of the BWP.

According to aspects of the present disclosure, a network entitychanging at least one of a minimum control-channel-to-data-channel delayto a new minimum control-channel-to-data-channel delay may include thenetwork entity changing from a first number of slots to a second numberof slots smaller than the first number.

In aspects of the present disclosure, a network entity changing abandwidth of a BWP to a new bandwidth may include the network entitychanging from a first bandwidth to a second bandwidth larger than thefirst bandwidth.

According to aspects of the present disclosure, a network entityobtaining an indication may include the network entity receiving a newminimum control-channel-to-data-channel delay or a new bandwidth on aBWP in at least one of a RRC signal, a MAC-CE or a DCI.

In aspects of the present disclosure, a network entity obtaining anindication may include the network entity determining to change aminimum control-channel-to-data-channel delay or to change a bandwidthof a BWP.

According to aspects of the present disclosure, a network entityobtaining an indication may include the network entity receiving a NACKin response to transmitting a retransmission. In some such aspects, thenetwork entity obtaining the indication may include the network entitytransmitting a threshold number of retransmissions.

In aspects of the present disclosure, a network entity obtaining anindication may include the network entity transmitting a thresholdnumber of second transmissions. In some such aspects, the network entitytransmitting the threshold number of second transmissions includes thenetwork entity transmitting the threshold number of second transmissionsduring an active portion of a CDRX configuration of the UE.

FIG. 11 shows a transmission timeline 1100 showing a UE performingmicrosleep, in accordance with certain aspects of the presentdisclosure. In the transmission timeline 1100, a cross-slot schedulingis used at 1112. Accordingly, during slots 1110 and 1120, the UE startsthe micro-sleep after receiving a PDCCH, at 1114. The PDCCH conveys agrant for a first transmission (1^(st) Tx) of a PDSCH 1164 to bereceived by the UE. The UE fails to decode the PDSCH 1164 and transmitsa NACK 1152 to a network entity. In response to the NACK 1152, at 1130,K0 is changed to 0 (i.e., a same-slot scheduling) for a retransmission(ReTx). As mentioned above, K0 may be changed to 0 in response to aconfiguration transmitted by the network entity, or the UE may change K0to 0 autonomously. In this example, M=1. In the slot 1122, the networkentity transmits a PDCCH 1174 that conveys a grant for a PDSCH 1184 thatis in the same slot (i.e., K0=0). The UE successfully decodes the PDSCH1184 and transmits an acknowledgment (ACK) 1154. In response to the ACK1154, K0 is changed back to 1 at 1160. At 1132, the network entitytransmits a PDCCH 1190 conveying a grant for another 1^(st) Tx of aPDSCH 1192, which occurs one slot after the PDCCH 1190, and the UEenters the micro-sleep during the slot 1132.

In certain aspects, for each data burst, K0>0 is assumed by a UE until afirst N PDSCHs (e.g., N=1) are received, i.e., the first N PDSCHs arebased on a cross-slot scheduling. The UE then uses (i.e., assumes) K0=0(i.e., a same-slot scheduling) for remaining PDSCHs of a data burst.

In certain aspects, if a UE is configured with CDRX, then each databurst may be allocated during an awake portion (i.e., CDRX activeduration) by matching a CDRX cycle and an inactivity timer with a burstpattern, including an inter-burst interval and a burst duration.

In certain aspects, if C-DRX is not configured on a UE, then the UEshould go to sleep (e.g., use deep sleep, light sleep, micro-sleep, or acombination) and wake up according to a burst pattern.

In certain aspects, for transmissions of same information data within aHARQ process, a bandwidth of a BWP conveying the transmissions may beset to a first value, B1, for the first L (e.g., L=1) transmissions.Then, the bandwidth may be set to a second value, B2 (e.g., B2>B1) forthe subsequent retransmissions of the same information data within theHARQ process if the UE fails to decode all the first L transmissions.

In certain aspects, for each data burst, a bandwidth of a BWP conveyingthe data burst may be set to a first value, B1, until a first K (e.g.,K=1) PDSCHs are received by the UE. Then, the bandwidth may be set to asecond value, B2 (e.g., B2>B1) for the remaining PDSCHs of the databurst.

In certain aspects, a network entity and a UE may choose to adopt one ormore K0 adaptation and BWP bandwidth adaption techniques andindependently set related parameters (e.g., the network entity and UEset the parameters without communicating the change to each other).

FIG. 12 illustrates a communications device 1200 that may includevarious components (e.g., corresponding to means-plus-functioncomponents) configured to perform operations for the techniquesdisclosed herein, such as the operations illustrated in FIG. 9. Thecommunications device 1200 includes a processing system 1202 coupled toa transceiver 1208 (e.g., a transmitter and/or a receiver). Thetransceiver 1208 is configured to transmit and receive signals for thecommunications device 1200 via an antenna 1210, such as the varioussignals as described herein. The processing system 1202 may beconfigured to perform processing functions for the communications device1200, including processing signals received and/or to be transmitted bythe communications device 1200.

The processing system 1202 includes a processor 1204 coupled to acomputer-readable medium/memory 1212 via a bus 1206. In certain aspects,the computer-readable medium/memory 1212 is configured to storeinstructions (e.g., computer-executable code) that when executed by theprocessor 1204, cause the processor 1204 to perform the operationsillustrated in FIG. 9, or other operations for performing the varioustechniques discussed herein. In certain aspects, computer-readablemedium/memory 1212 stores code 1214 for obtaining, code 1216 forchanging, and code 1218 for receiving. The code 1214 for obtaining mayinclude code for obtaining an indication to change at least one of aminimum control-channel-to-data-channel delay or a bandwidth forreceiving a first transmission on a BWP. The code 1216 for changing mayinclude code for changing the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth. The code 1218 for receiving may include code forreceiving the first transmission on the BWP using at least one of thenew minimum control-channel-to-data-channel delay or the new bandwidthof the BWP.

The processor 1204 may include circuitry configured to implement thecode stored in the computer-readable medium/memory 1212, such as forperforming the operations illustrated in FIG. 9, as well as otheroperations for performing the various techniques discussed herein. Forexample, the processor 1204 includes circuitry 1220 for obtaining,circuitry 1222 for changing, and circuitry 1224 for receiving. Thecircuitry 1220 for obtaining may include circuitry for obtaining anindication to change at least one of a minimumcontrol-channel-to-data-channel delay or a bandwidth for receiving afirst transmission on a BWP. The circuitry 1222 for changing may includecircuitry for changing the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth. The circuitry 1224 for receiving may include circuitryfor receiving the first transmission on the BWP using at least one ofthe new minimum control-channel-to-data-channel delay or the newbandwidth of the BWP.

FIG. 13 illustrates a communications device 1300 that may includevarious components (e.g., corresponding to means-plus-functioncomponents) configured to perform operations for the techniquesdisclosed herein, such as the operations illustrated in FIG. 10. Thecommunications device 1300 includes a processing system 1302 coupled toa transceiver 1308 (e.g., a transmitter and/or a receiver). Thetransceiver 1308 is configured to transmit and receive signals for thecommunications device 1300 via an antenna 1310, such as the varioussignals as described herein. The processing system 1302 may beconfigured to perform processing functions for the communications device1300, including processing signals received and/or to be transmitted bythe communications device 1300.

The processing system 1302 includes a processor 1304 coupled to acomputer-readable medium/memory 1312 via a bus 1306. In certain aspects,the computer-readable medium/memory 1312 is configured to storeinstructions (e.g., computer-executable code) that when executed by theprocessor 1304, cause the processor 1304 to perform the operationsillustrated in FIG. 10, or other operations for performing the varioustechniques discussed herein. In certain aspects, computer-readablemedium/memory 1312 stores code 1314 for obtaining, code 1316 forchanging, and code 1318 for receiving. The code 1314 for obtaining mayinclude code for obtaining an indication to change at least one of aminimum control-channel-to-data-channel delay or a bandwidth fortransmitting a first transmission on a BWP to a UE. The code 1316 forchanging may include code for changing the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth for the first transmission to the UE. The code 1318 fortransmitting may include code for transmitting the first transmission onthe BWP using at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.

The processor 1304 may include circuitry configured to implement thecode stored in the computer-readable medium/memory 1312, such as forperforming the operations illustrated in FIG. 10, as well as otheroperations for performing the various techniques discussed herein. Forexample, the processor 1304 includes circuitry 1320 for obtaining,circuitry 1322 for changing, and circuitry 1322 for transmitting. Thecircuitry 1320 for obtaining may include circuitry for obtaining anindication to change at least one of a minimumcontrol-channel-to-data-channel delay or a bandwidth for transmitting afirst transmission on a BWP to a UE. The circuitry 1322 for changing mayinclude circuitry for changing the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth for the first transmission to the UE. The circuitry 1324for transmitting may include circuitry for transmitting the firsttransmission on the BWP using at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.

Example Aspects

Implementation examples are described in the following numbered aspects.

In a first aspect, a method of wireless communications by a userequipment (UE), comprising: obtaining an indication to change at leastone of a minimum control-channel-to-data-channel delay or a bandwidthfor receiving a first transmission on a bandwidth part (BWP); changingthe at least one of the minimum control-channel-to-data-channel delay toa new minimum control-channel-to-data-channel delay or the bandwidth onthe BWP to a new bandwidth; and receiving the first transmission on theBWP using at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.

In a second aspect, alone or in combination with the first aspect,changing the at least one of the minimum control-channel-to-data-channeldelay to a new minimum control-channel-to-data-channel delay compriseschanging from a first number of slots to a second number of slotssmaller than the first number.

In a third aspect, alone or in combination with one or more of the firstand second aspects, changing the bandwidth of the BWP to the newbandwidth comprises changing from a first bandwidth to a secondbandwidth larger than the first bandwidth.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, obtaining the indication comprisesreceiving the new minimum control-channel-to-data-channel delay or thenew bandwidth on the BWP in at least one of a radio resource control(RRC) signal, a medium access control-control element (MAC-CE) or adownlink control information (DCI).

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, obtaining the indication comprises determining,by the UE, to change the minimum control-channel-to-data-channel delayor to change the bandwidth of the BWP.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, obtaining the indication comprises sending anegative acknowledgment (NACK) in response to a receiving aretransmission.

In a seventh aspect, alone or in combination with one or more of thefirst through sixth aspects, obtaining the indication comprisesreceiving a threshold number of retransmissions.

In an eighth aspect, alone or in combination with one or more of thefirst through seventh aspects, obtaining the indication comprisesreceiving a threshold number of second transmissions.

In a ninth aspect, alone or in combination with one or more of the firstthrough eighth aspects, receiving the threshold number of secondtransmissions comprises receiving the threshold number of secondtransmissions during an active portion of a connected mode discontinuousreception (CDRX) configuration.

In a tenth aspect, a method of wireless communications by a networkentity, comprising: obtaining an indication to change at least one of aminimum control-channel-to-data-channel delay or a bandwidth fortransmitting a first transmission on a bandwidth part (BWP) to a userequipment (UE); changing the at least one of the minimumcontrol-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth for the first transmission to the UE; and transmitting thefirst transmission on the BWP using at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.

In an eleventh aspect, alone or in combination with the tenth aspect,changing the at least one of the minimum control-channel-to-data-channeldelay to a new minimum control-channel-to-data-channel delay compriseschanging from a first number of slots to a second number of slotssmaller than the first number.

In a twelfth aspect, alone or in combination with one or more of thetenth and eleventh aspects, changing the bandwidth of the BWP to the newbandwidth comprises changing from a first bandwidth to a secondbandwidth larger than the first bandwidth.

In a thirteenth aspect, alone or in combination with one or more of thetenth through twelfth aspects, obtaining the indication comprisesreceiving the new minimum control-channel-to-data-channel delay or thenew bandwidth on the BWP in at least one of a radio resource control(RRC) signal, a medium access control-control element (MAC-CE) or adownlink control information (DCI).

In a fourteenth aspect, alone or in combination with one or more of thetenth through thirteenth aspects, obtaining the indication comprisesdetermining, by the BS, to change the minimumcontrol-channel-to-data-channel delay or to change the bandwidth of theBWP.

In a fifteenth aspect, alone or in combination with one or more of thetenth through fourteenth aspects, obtaining the indication comprisesreceiving a negative acknowledgment (NACK) in response to transmitting aretransmission.

In a sixteenth aspect, alone or in combination with one or more of thetenth through fifteenth aspects, obtaining the indication comprisestransmitting a threshold number of retransmissions.

In a seventeenth aspect, alone or in combination with one or more of thetenth through sixteenth aspects, obtaining the indication comprisestransmitting a threshold number of second transmissions.

In an eighteenth aspect, alone or in combination with one or more of thetenth through seventeenth aspects, transmitting the threshold number ofsecond transmissions comprises transmitting the threshold number ofsecond transmissions during an active portion of a connected modediscontinuous reception (CDRX) configuration of the UE.

An apparatus for wireless communication, comprising at least oneprocessor; and a memory coupled to the at least one processor, thememory comprising code executable by the at least one processor to causethe apparatus to perform the method of any of the first througheighteenth aspects.

An apparatus comprising means for performing the method of any of thefirst through eighteenth aspects.

A computer readable medium storing computer executable code thereon forwireless communications that, when executed by at least one processor,cause an apparatus to perform the method of any of the first througheighteenth aspects.

Additional Considerations

The techniques described herein may be used for various wirelesscommunication technologies, such as NR (e.g., 5G NR), 3GPP Long TermEvolution (LTE), LTE-Advanced (LTE-A), code division multiple access(CDMA), time division multiple access (TDMA), frequency divisionmultiple access (FDMA), orthogonal frequency division multiple access(OFDMA), single-carrier frequency division multiple access (SC-FDMA),time division synchronous code division multiple access (TD-SCDMA), andother networks. The terms “network” and “system” are often usedinterchangeably. A CDMA network may implement a radio technology such asUniversal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includesWideband CDMA (WCDMA) and other variants of CDMA. cdma2000 coversIS-2000, IS-95 and IS-856 standards. A TDMA network may implement aradio technology such as Global System for Mobile Communications (GSM).An OFDMA network may implement a radio technology such as NR (e.g. 5GRA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA andE-UTRA are part of Universal Mobile Telecommunication System (UMTS). LTEand LTE-A are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE,LTE-A and GSM are described in documents from an organization named “3rdGeneration Partnership Project” (3GPP). cdma2000 and UMB are describedin documents from an organization named “3rd Generation PartnershipProject 2” (3GPP2). NR is an emerging wireless communications technologyunder development.

In 3GPP, the term “cell” can refer to a coverage area of a Node B (NB)and/or a NB subsystem serving this coverage area, depending on thecontext in which the term is used. In NR systems, the term “cell” andBS, next generation NodeB (gNB or gNodeB), access point (AP),distributed unit (DU), carrier, or transmission reception point (TRP)may be used interchangeably. A BS may provide communication coverage fora macro cell, a pico cell, a femto cell, and/or other types of cells. Amacro cell may cover a relatively large geographic area (e.g., severalkilometers in radius) and may allow unrestricted access by UEs withservice subscription. A pico cell may cover a relatively smallgeographic area and may allow unrestricted access by UEs with servicesubscription. A femto cell may cover a relatively small geographic area(e.g., a home) and may allow restricted access by UEs having anassociation with the femto cell (e.g., UEs in a Closed Subscriber Group(CSG), UEs for users in the home, etc.). A BS for a macro cell may bereferred to as a macro BS. A BS for a pico cell may be referred to as apico BS. A BS for a femto cell may be referred to as a femto BS or ahome BS.

A UE may also be referred to as a mobile station, a terminal, an accessterminal, a subscriber unit, a station, a customer premises equipment(CPE), a cellular phone, a smart phone, a personal digital assistant(PDA), a wireless modem, a wireless communication device, a handhelddevice, a laptop computer, a cordless phone, a wireless local loop (WLL)station, a tablet computer, a camera, a gaming device, a netbook, asmart book, an appliance, a medical device or medical equipment, abiometric sensor/device, a wearable device such as a smart watch, smartclothing, smart glasses, a smart wrist band, smart jewelry (e.g., asmart ring, a smart bracelet, etc.), an entertainment device (e.g., amusic device, a video device, a satellite radio, etc.), a vehicularcomponent or sensor, a smart meter/sensor, industrial manufacturingequipment, a global positioning system device, or any other suitabledevice that is configured to communicate via a wireless or wired medium.Some UEs may be considered machine-type communication (MTC) devices orevolved MTC (eMTC) devices. MTC and eMTC UEs include, for example,robots, drones, remote devices, sensors, meters, monitors, locationtags, etc., that may communicate with a BS, another device (e.g., remotedevice), or some other entity. A wireless node may provide, for example,connectivity for or to a network (e.g., a wide area network such asInternet or a cellular network) via a wired or wireless communicationlink. Some UEs may be considered Internet-of-Things (IoT) devices, whichmay be narrowband IoT (NB-IoT) devices.

In some examples, access to the air interface may be scheduled. Ascheduling entity (e.g., a BS) allocates resources for communicationamong some or all devices and equipment within its service area or cell.The scheduling entity may be responsible for scheduling, assigning,reconfiguring, and releasing resources for one or more subordinateentities. That is, for scheduled communication, subordinate entitiesutilize resources allocated by the scheduling entity. BSs are not theonly entities that may function as a scheduling entity. In someexamples, a UE may function as a scheduling entity and may scheduleresources for one or more subordinate entities (e.g., one or more otherUEs), and the other UEs may utilize the resources scheduled by the UEfor wireless communication. In some examples, a UE may function as ascheduling entity in a peer-to-peer (P2P) network, and/or in a meshnetwork. In a mesh network example, UEs may communicate directly withone another in addition to communicating with a scheduling entity.

The methods disclosed herein comprise one or more steps or actions forachieving the methods. The method steps and/or actions may beinterchanged with one another without departing from the scope of theclaims. In other words, unless a specific order of steps or actions isspecified, the order and/or use of specific steps and/or actions may bemodified without departing from the scope of the claims.

As used herein, a phrase referring to “at least one of” a list of itemsrefers to any combination of those items, including single members. Asan example, “at least one of: a, b, or c” is intended to cover a, b, c,a-b, a-c, b-c, and a-b-c, as well as any combination with multiples ofthe same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b,b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

As used herein, the term “determining” encompasses a wide variety ofactions. For example, “determining” may include calculating, computing,processing, deriving, investigating, looking up (e.g., looking up in atable, a database or another data structure), ascertaining and the like.Also, “determining” may include receiving (e.g., receiving information),accessing (e.g., accessing data in a memory) and the like. Also,“determining” may include resolving, selecting, choosing, establishingand the like.

The previous description is provided to enable any person skilled in theart to practice the various aspects described herein. Variousmodifications to these aspects will be readily apparent to those skilledin the art, and the generic principles defined herein may be applied toother aspects. Thus, the claims are not intended to be limited to theaspects shown herein, but is to be accorded the full scope consistentwith the language of the claims, wherein reference to an element in thesingular is not intended to mean “one and only one” unless specificallyso stated, but rather “one or more.” Unless specifically statedotherwise, the term “some” refers to one or more. All structural andfunctional equivalents to the elements of the various aspects describedthroughout this disclosure that are known or later come to be known tothose of ordinary skill in the art are expressly incorporated herein byreference and are intended to be encompassed by the claims. Moreover,nothing disclosed herein is intended to be dedicated to the publicregardless of whether such disclosure is explicitly recited in theclaims. No claim element is to be construed under the provisions of 35U.S.C. § 112(f) unless the element is expressly recited using the phrase“means for” or, in the case of a method claim, the element is recitedusing the phrase “step for.”

The various operations of methods described above may be performed byany suitable means capable of performing the corresponding functions.The means may include various hardware and/or software component(s)and/or module(s), including, but not limited to a circuit, anapplication specific integrated circuit (ASIC), or processor. Generally,where there are operations illustrated in figures, those operations mayhave corresponding counterpart means-plus-function components withsimilar numbering.

The various illustrative logical blocks, modules and circuits describedin connection with the present disclosure may be implemented orperformed with a general purpose processor, a digital signal processor(DSP), an application specific integrated circuit (ASIC), a fieldprogrammable gate array (FPGA) or other programmable logic device (PLD),discrete gate or transistor logic, discrete hardware components, or anycombination thereof designed to perform the functions described herein.A general-purpose processor may be a microprocessor, but in thealternative, the processor may be any commercially available processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices, e.g., a combinationof a DSP and a microprocessor, a plurality of microprocessors, one ormore microprocessors in conjunction with a DSP core, or any other suchconfiguration.

If implemented in hardware, an example hardware configuration maycomprise a processing system in a wireless node. The processing systemmay be implemented with a bus architecture. The bus may include anynumber of interconnecting buses and bridges depending on the specificapplication of the processing system and the overall design constraints.The bus may link together various circuits including a processor,machine-readable media, and a bus interface. The bus interface may beused to connect a network adapter, among other things, to the processingsystem via the bus. The network adapter may be used to implement thesignal processing functions of the PHY layer. In the case of a userterminal (see FIG. 1), a user interface (e.g., keypad, display, mouse,joystick, etc.) may also be connected to the bus. The bus may also linkvarious other circuits such as timing sources, peripherals, voltageregulators, power management circuits, and the like, which are wellknown in the art, and therefore, will not be described any further. Theprocessor may be implemented with one or more general-purpose and/orspecial-purpose processors. Examples include microprocessors,microcontrollers, DSP processors, and other circuitry that can executesoftware. Those skilled in the art will recognize how best to implementthe described functionality for the processing system depending on theparticular application and the overall design constraints imposed on theoverall system.

If implemented in software, the functions may be stored or transmittedover as one or more instructions or code on a computer readable medium.Software shall be construed broadly to mean instructions, data, or anycombination thereof, whether referred to as software, firmware,middleware, microcode, hardware description language, or otherwise.Computer-readable media include both computer storage media andcommunication media including any medium that facilitates transfer of acomputer program from one place to another. The processor may beresponsible for managing the bus and general processing, including theexecution of software modules stored on the machine-readable storagemedia. A computer-readable storage medium may be coupled to a processorsuch that the processor can read information from, and write informationto, the storage medium. In the alternative, the storage medium may beintegral to the processor. By way of example, the machine-readable mediamay include a transmission line, a carrier wave modulated by data,and/or a computer readable storage medium with instructions storedthereon separate from the wireless node, all of which may be accessed bythe processor through the bus interface. Alternatively, or in addition,the machine-readable media, or any portion thereof, may be integratedinto the processor, such as the case may be with cache and/or generalregister files. Examples of machine-readable storage media may include,by way of example, RAM (Random Access Memory), flash memory, ROM (ReadOnly Memory), PROM (Programmable Read-Only Memory), EPROM (ErasableProgrammable Read-Only Memory), EEPROM (Electrically ErasableProgrammable Read-Only Memory), registers, magnetic disks, opticaldisks, hard drives, or any other suitable storage medium, or anycombination thereof. The machine-readable media may be embodied in acomputer-program product.

A software module may comprise a single instruction, or manyinstructions, and may be distributed over several different codesegments, among different programs, and across multiple storage media.The computer-readable media may comprise a number of software modules.The software modules include instructions that, when executed by anapparatus such as a processor, cause the processing system to performvarious functions. The software modules may include a transmissionmodule and a receiving module. Each software module may reside in asingle storage device or be distributed across multiple storage devices.By way of example, a software module may be loaded into RAM from a harddrive when a triggering event occurs. During execution of the softwaremodule, the processor may load some of the instructions into cache toincrease access speed. One or more cache lines may then be loaded into ageneral register file for execution by the processor. When referring tothe functionality of a software module below, it will be understood thatsuch functionality is implemented by the processor when executinginstructions from that software module.

Also, any connection is properly termed a computer-readable medium. Forexample, if the software is transmitted from a website, server, or otherremote source using a coaxial cable, fiber optic cable, twisted pair,digital subscriber line (DSL), or wireless technologies such as infrared(IR), radio, and microwave, then the coaxial cable, fiber optic cable,twisted pair, DSL, or wireless technologies such as infrared, radio, andmicrowave are included in the definition of medium. Disk and disc, asused herein, include compact disc (CD), laser disc, optical disc,digital versatile disc (DVD), floppy disk, and Blu-ray® disc where disksusually reproduce data magnetically, while discs reproduce dataoptically with lasers. Thus, in some aspects computer-readable media maycomprise non-transitory computer-readable media (e.g., tangible media).In addition, for other aspects computer-readable media may comprisetransitory computer-readable media (e.g., a signal). Combinations of theabove should also be included within the scope of computer-readablemedia.

Thus, certain aspects may comprise a computer program product forperforming the operations presented herein. For example, such a computerprogram product may comprise a computer-readable medium havinginstructions stored (and/or encoded) thereon, the instructions beingexecutable by one or more processors to perform the operations describedherein. For example, instructions for performing the operationsdescribed herein and illustrated in FIG. 9 and/or FIG. 10.

Further, it should be appreciated that modules and/or other appropriatemeans for performing the methods and techniques described herein can bedownloaded and/or otherwise obtained by a user terminal and/or basestation as applicable. For example, such a device can be coupled to aserver to facilitate the transfer of means for performing the methodsdescribed herein. Alternatively, various methods described herein can beprovided via storage means (e.g., RAM, ROM, a physical storage mediumsuch as a compact disc (CD) or floppy disk, etc.), such that a userterminal and/or base station can obtain the various methods uponcoupling or providing the storage means to the device. Moreover, anyother suitable technique for providing the methods and techniquesdescribed herein to a device can be utilized.

It is to be understood that the claims are not limited to the preciseconfiguration and components illustrated above. Various modifications,changes and variations may be made in the arrangement, operation anddetails of the methods and apparatus described above without departingfrom the scope of the claims.

1. A method of wireless communications by a user equipment (UE),comprising: obtaining an indication to change at least one of a minimumcontrol-channel-to-data-channel delay or a bandwidth for receiving afirst transmission on a bandwidth part (BWP); changing the at least oneof the minimum control-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth; and receiving the first transmission on the BWP using atleast one of the new minimum control-channel-to-data-channel delay orthe new bandwidth of the BWP.
 2. The method of claim 1, wherein changingthe at least one of the minimum control-channel-to-data-channel delay toa new minimum control-channel-to-data-channel delay comprises changingfrom a first number of slots to a second number of slots smaller thanthe first number.
 3. The method of claim 1, wherein changing thebandwidth of the BWP to the new bandwidth comprises changing from afirst bandwidth to a second bandwidth larger than the first bandwidth.4. The method of claim 1, wherein obtaining the indication comprisesreceiving the new minimum control-channel-to-data-channel delay or thenew bandwidth on the BWP in at least one of a radio resource control(RRC) signal, a medium access control-control element (MAC-CE) or adownlink control information (DCI).
 5. The method of claim 1, whereinobtaining the indication comprises determining, by the UE, to change theminimum control-channel-to-data-channel delay or to change the bandwidthof the BWP.
 6. The method of claim 1, wherein obtaining the indicationcomprises sending a negative acknowledgment (NACK) in response to areceiving a retransmission.
 7. The method of claim 6, wherein obtainingthe indication comprises receiving a threshold number ofretransmissions.
 8. The method of claim 1, wherein obtaining theindication comprises receiving a threshold number of secondtransmissions.
 9. The method of claim 8, wherein receiving the thresholdnumber of second transmissions comprises receiving the threshold numberof second transmissions during an active portion of a connected modediscontinuous reception (CDRX) configuration.
 10. A method of wirelesscommunications by a network entity, comprising: obtaining an indicationto change at least one of a minimum control-channel-to-data-channeldelay or a bandwidth for transmitting a first transmission on abandwidth part (BWP) to a user equipment (UE); changing the at least oneof the minimum control-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay or the bandwidth on the BWP to anew bandwidth for the first transmission to the UE; and transmitting thefirst transmission on the BWP using at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.11. The method of claim 10, wherein changing the at least one of theminimum control-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay comprises changing from a firstnumber of slots to a second number of slots smaller than the firstnumber.
 12. The method of claim 10, wherein changing the bandwidth ofthe BWP to the new bandwidth comprises changing from a first bandwidthto a second bandwidth larger than the first bandwidth.
 13. The method ofclaim 10, wherein obtaining the indication comprises receiving the newminimum control-channel-to-data-channel delay or the new bandwidth onthe BWP in at least one of a radio resource control (RRC) signal, amedium access control-control element (MAC-CE) or a downlink controlinformation (DCI).
 14. The method of claim 10, wherein obtaining theindication comprises determining, by the BS, to change the minimumcontrol-channel-to-data-channel delay or to change the bandwidth of theBWP.
 15. The method of claim 10, wherein obtaining the indicationcomprises receiving a negative acknowledgment (NACK) in response totransmitting a retransmission.
 16. The method of claim 15, whereinobtaining the indication comprises transmitting a threshold number ofretransmissions.
 17. The method of claim 10, wherein obtaining theindication comprises transmitting a threshold number of secondtransmissions.
 18. The method of claim 17, wherein transmitting thethreshold number of second transmissions comprises transmitting thethreshold number of second transmissions during an active portion of aconnected mode discontinuous reception (CDRX) configuration of the UE.19. An apparatus of wireless communications, comprising: at least oneprocessor and a memory configured to: obtain an indication to change atleast one of a minimum control-channel-to-data-channel delay or abandwidth for receiving a first transmission on a bandwidth part (BWP);change the at least one of the minimum control-channel-to-data-channeldelay to a new minimum control-channel-to-data-channel delay or thebandwidth on the BWP to a new bandwidth; and receive the firsttransmission on the BWP using at least one of the new minimumcontrol-channel-to-data-channel delay or the new bandwidth of the BWP.20. The apparatus of claim 19, wherein changing the at least one of theminimum control-channel-to-data-channel delay to a new minimumcontrol-channel-to-data-channel delay comprises changing from a firstnumber of slots to a second number of slots smaller than the firstnumber.
 21. The apparatus of claim 19, wherein changing the bandwidth ofthe BWP to the new bandwidth comprises changing from a first bandwidthto a second bandwidth larger than the first bandwidth.
 22. The apparatusof claim 19, wherein obtaining the indication comprises receiving thenew minimum control-channel-to-data-channel delay or the new bandwidthon the BWP in at least one of a radio resource control (RRC) signal, amedium access control-control element (MAC-CE) or a downlink controlinformation (DCI).
 23. The apparatus of claim 19, wherein obtaining theindication comprises determining to change the minimumcontrol-channel-to-data-channel delay or to change the bandwidth of theBWP.
 24. The apparatus of claim 19, wherein obtaining the indicationcomprises sending a negative acknowledgment (NACK) in response to areceiving a retransmission.
 25. An apparatus of wireless communications,comprising: at least one processor and a memory configured to: obtain anindication to change at least one of a minimumcontrol-channel-to-data-channel delay or a bandwidth for transmitting afirst transmission on a bandwidth part (BWP) to a user equipment (UE);change the at least one of the minimum control-channel-to-data-channeldelay to a new minimum control-channel-to-data-channel delay or thebandwidth on the BWP to a new bandwidth for the first transmission tothe UE; and transmit the first transmission on the BWP using at leastone of the new minimum control-channel-to-data-channel delay or the newbandwidth of the BWP.
 26. The apparatus of claim 25, wherein changingthe at least one of the minimum control-channel-to-data-channel delay toa new minimum control-channel-to-data-channel delay comprises changingfrom a first number of slots to a second number of slots smaller thanthe first number.
 27. The apparatus of claim 25, wherein changing thebandwidth of the BWP to the new bandwidth comprises changing from afirst bandwidth to a second bandwidth larger than the first bandwidth.28. The apparatus of claim 25, wherein obtaining the indicationcomprises receiving the new minimum control-channel-to-data-channeldelay or the new bandwidth on the BWP in at least one of a radioresource control (RRC) signal, a medium access control-control element(MAC-CE) or a downlink control information (DCI).
 29. The apparatus ofclaim 25, wherein obtaining the indication comprises determining tochange the minimum control-channel-to-data-channel delay or to changethe bandwidth of the BWP.
 30. The apparatus of claim 25, whereinobtaining the indication comprises receiving a negative acknowledgment(NACK) in response to transmitting a retransmission.